But I just had a user bitten by a change in behaviour between dnf and yum that was discovered here:

This is the bug raised with my package:

It seems very unintuitive to the user, and wasn't initially apparent to me until I look at all open dnf bugs and did a "find on page" for "obsolete"

For now I've opened a rel-eng ticket to get the letsencrypt packages properly removed from the F23 repos so that a dnf install letsencrypt, like F24 behaviour, will install certbot.

I guess the real question is - is the dnf behaviour correct, and if the dnf behaviour isn't going to change should we allow packagers to retire from a released branch?